Article writing needed, 5 articles. please bid

Greetings everybody, Here are the 5 artciles i need for my website. I want professional articles so all the visitors can feel it and trust this site. The site address is www.no-biggie.com. PLEASE ONLY NATIVE ENGLISH WRITERS. EACH ARTICLES 500 words or more. 1, After sales service Based on the products i'm doing, try to write the after sales service policy. 2, About Us (company profile) Refer to the products i'm doing. (The bio products, urinal cleaning products etc. ) 3, OEM Service. OEM service Policy details. 4, Help develop a product The whole procedure of how to help develop a product. (cleaning related) 5, Product over view. The topic would be about the 6 types of the products we're manufacturing.